V85 Speedometer inaccuracy

[Zoom Zoom]

Personally, I consider Mark's one word answer to be the end for now. No doubt that if in the future he can tweak that value in a table someplace, he will likely bring it to our attention.

Just sayin

ZZ

[Huzo]

Well mate, being of the same opinion as Mark will always be the safest bet.
If I had put money on the outcome I’d have a quiet $100 bucks on him also, but I’m not going to sit around and wait for the all clear to do my own thinking however infantile it might be in comparison.

[Zoom Zoom]

 

ZZ

[RinkRat II]

     Huzo, I do know on some of the commercial abs systems, you have to recalibrate the computer if wheel diameters are changed or fall out of the parameters being used.(smaller tire circumference front to back or side to side due to wear) But these are all resettable in the programs and may be yours is adaptable too. I don't know how you would go about getting the reader and info needed for yours and if it's not proprietary. Who makes the system? 

   Paul B

[Huzo]

     Huzo, I do know on some of the commercial abs systems, you have to recalibrate the computer if wheel diameters are changed or fall out of the parameters being used.(smaller tire circumference front to back or side to side due to wear) But these are all resettable in the programs and may be yours is adaptable too. I don't know how you would go about getting the reader and info needed for yours and if it's not proprietary. Who makes the system? 

   Paul B

The re calibration is a straightforward procedure to satisfy the requirements of the ABS and TC.
As Beetle (no doubt correctly) points out, the info is shoved up the wire and crunched in the brain.
What my intention is, is to send a modified signal up the wire to tell the brain that the wheel is turning 6% slower.
Where I’m really hazy is, will modifying the signal equally front and rear keep the ABS and TC relatively happy.
If the brain gets the idea that both wheels are not turning at the expected rate with respect to each other, it’ll think a loss of traction has occurred and blow the whistle.
I’m relatively confident that a recalibration will satisfy the ABS and TC because this is standard procedure when fitting different size tyres.

[Zoom Zoom]

I was talking to a friend. He used something called a speedo healer on his gold wing. I have no idea if this would be compatible or not, but something tangible perhaps worth taking a look at.

https://www.healtech-electronics.com/products/sh/

John Henry

[Huzo]

I was talking to a friend. He used something called a speedo healer on his gold wing. I have no idea if this would be compatible or not, but something tangible perhaps worth taking a look at.

https://www.healtech-electronics.com/products/sh/

John Henry

Bloody hell, that’s a tempting proposition if there are no hidden thorns.
I’d be well pleased if I could succeed in my endeavours, but there’s a fair body of informed opinion that says I can’t.
I’m going to do some homework about this thing.
Thank you ZZ

[beetle]

Won’t work on your V85. Or anyone’s bike with the 7SM. 

[piecemealadventurer]

Well Mick of all the things I could be accused of, I didn’t think that would have been one of them.
I would get out more, but I’m scared of losing my keys..!

Mate the weather is crap for the start of summer better off in the shed atm.  If you do lose those keys remember to look under the table!!!

[Huzo]

Mate the weather is crap for the start of summer better off in the shed atm.  If you do lose those keys remember to look under the table!!!

Will do, and Stoke the fire while there..!

[Huzo]

Well, I’m ready to start.
I know how to make the new tone wheel and cut the 45 slots.
Marks advice has rattled me to be sure, but I cannot see the problem. This will be due  to my complete lack of knowlege regarding ECU matters.
Again, I’m staking my arse on the fact that all I’m doing is altering the road speed at which the required pulse frequency occurs.
Instead of getting 700 odd at 100 k’s actual, I’ll be getting it at 107 k actual.
I’m going to pursue the matter and I’ll document my processes, whether it ends in success or the predicted failure, I’ll post the results.
It’ll be a while though..

[Pizza Guzzi]

Again, I’m staking my arse

Sounds quite painful, hope it's worth it 😝

[Huzo]

Sounds quite painful, hope it's worth it 😝

Getting caught is the crime..

[beetle]

Or wait until we figure out where the Speedo correction is in the map? After all, 6% isn’t bad.

[Huzo]

Or wait until we figure out where the Speedo correction is in the map? After all, 6% isn’t bad.

That would be an ideal solution Mark.
I can’t expect you to pull the same rabbit out of your.....hat, as you did with my Norge.
6% as you say is acceptable, if you have to..
I’m not convinced that I have to. If you hadn’t done the wizardry that you did, I and many others would have to put up with Norges that “weren’t bad”.
Yes they bloody well were and  thanks to you now they’re fabulous.
My Norge goes further on 23 litres @ 110 kph than my V85, that’s ‘cos you didn’t settle for mediocrity. How may so called tuners in Mandello would have burst into bouts of derisive laughter when they heard of a no name Aussie bumpkin who could wipe the floor with them.
I didn’t have the chops to venture where you do electronically, but I’m having a crack at the hardware...

[Huzo]

Huzo , I like a challenge as much as the next guy , but wouldn't it be easier to just add a GPS speedometer ?

 Dusty

Yes mate.
But that’s what people who have no other choice would do.
I’ll do that after I’ve eaten my humble pie and Pete’s leftover crow.

[MMRanch]

Huzo

Wouldn't it be easier just to put a 150/80-17 tire on the rear then let your bike relearn the new tire ?

You know , Life is hard enough as it is ... why not make it easy every chance ya get  ?   

[beetle]

My Griso is 7% slow at 100. I haven’t fixed, even though I can with just a couple of clicks. Why? Doesn’t bother me.

Be thankful you don’t own a non-ABS 1200 Sport. The front wheel sensor on those was as much as 12% out.

[Huzo]

My Griso is 7% slow at 100. I haven’t fixed, even though I can with just a couple of clicks. Why? Doesn’t bother me.

Be thankful you don’t own a non-ABS 1200 Sport. The front wheel sensor on those was as much as 12% out.

Yes Mark, it’s at your fingertips.
But if I owned a 1200 Griso, it wouldn’t worry me that it wasn’t a 1400.
I would sooner try what I propose and fail, than walk away.
I have no qualms doing the complex machining to produce what I think I need, there are people I know that are way above me intellectually that baulk at that prospect.
I see the intracicies of such a process as fundamentally self explanatory.
Horses for courses, is I believe the relevant expression.

[Huzo]

Huzo

Wouldn't it be easier just to put a 150/80-17 tire on the rear then let your bike relearn the new tire ?

You know , Life is hard enough as it is ... why not make it easy every chance ya get  ?   

Who was that great orator who said...
“We choose to do these and the other things...
Not because they are easy...but because they are hard....”

(Before you flame me..it’s a tongue in cheek reference...)

[Huzo]

My Griso is 7% slow at 100. I haven’t fixed, even though I can with just a couple of clicks. Why? Doesn’t bother me.

Be thankful you don’t own a non-ABS 1200 Sport. The front wheel sensor on those was as much as 12% out.

Mark, it would have been the tone wheel, not the sensor......Yes ?
The sensor only knows what the tone wheel tells it....(I hope)

[beetle]

Mark, it would have been the tone wheel, not the sensor......Yes ?
The sensor only knows what the tone wheel tells it....(I hope)

No tone wheels on non-ABS bikes. The sensors count the screws on brake disks. I don't think it was the sensor itself, simply the implementation in the software. The rear wheel sensors on the Griso and small tank Stelvio (ABS optional) were more accurate.


It never worried me that my Griso wasn't a 1400. I was happy to be a guinea pig. Having said that, I couldn't go back to a 1200. The grunt is intoxicating.

[Huzo]

No tone wheels on non-ABS bikes. The sensors count the screws on brake disks. I don't think it was the sensor itself, simply the implementation in the software. The rear wheel sensors on the Griso and small tank Stelvio (ABS optional) were more accurate.


It never worried me that my Griso wasn't a 1400. I was happy to be a guinea pig. Having said that, I couldn't go back to a 1200. The grunt is intoxicating.

Mark, I’ve never had occasion to doubt your word on anything and this is no exception.
Everyone who cares including you, have tried to point out where I might be wasting my time but I’m determined to go as far as I can without buggering something up terminally.
If I do it won’t be because no one tried to help.

[MMRanch]

It was John Kennedy talking about a Moon Shot ,

Good luck with it , and let us know how it turns out !   

Heck !  It shouldn't be that hard to make if ya got the right tools .   

[RinkRat II]

  Go for it Huzo! as my wifes brothers sister in-laws dad once said " if you don't try how will ya know?'' Hey they all laughed at Einstein too

      Paul B

[Huzo]

It was John Kennedy talking about a Moon Shot ,

Good luck with it , and let us know how it turns out !   

Heck !  It shouldn't be that hard to make if ya got the right tools .   

Yes mate, I know..(That was the tongue in cheek reference to which I eluded you see..)

Thank you and I will either way..(Derisive laughter and finger pointing will abound..)

No it shouldn’t and yes I have..(There will be many photo’s and a Days of Our Lives  type story..)

[rocker59]

Go on and do it.  Let us know the results.

I don't personally think you'll get the results you expect, but I'm curious to see what they are.

You have nothing to lose but a little time fabbing up some tone rings.

[Huzo]

I don't personally think you'll get the results you expect

Can you tell me definitively why you think that Rocker ?
What do YOU think will be the fly in the ointment that seals my fate... ?
Just for the sheer fun of it..
Tell me what YOU think would have been the effect on the needle deflection for a given speed, if the bike had come with 45 slots as standard instead of 48 ?

[Huzo]

Let us know the results.

Oh I most certainly will..
Of that there can be no doubt..I’ve started.
Just for the record and to make it easier to find you later, is there anyone out there that categorically agrees with me...?
You know.. 100% type of thing with no reservations.
Personally I hope not, better to be alone where a I’m going..

[rocker59]

Oh I most certainly will..
Of that there can be no doubt..I’ve started.